String cutter



May 6 1924.

' J. W. LNNEHAN VSTRING CUTTER Patented May 6, 1924.

UNIT

STRING CUTTER.

Application filed August 26, 1922. Serif-.11 11o. 584,459.

To all whom it may concern.'

Be it known that I, JAMES W. LINNEHAN, a citizen of the United States,residing'at South Boston, in the countyof Suffolk and State ofMassachusetts, have yinvented certain new and useful Improvements inString Cutters, of which the following is a full, clear, concise, andexact description.

My present invention relates to cutters, and more particularly to stringcutters for use in stores, shipping rooms and the like, where bundlesare wrapped up and tied with string, cord or similar bindingmaterial.

As heretofore constructed, string cutters have been of the straightblade variety, with little or no protection against accident on the partof the careless operator, and in many cases bad cuts have been inflictedfrom unprotected instruments of this class. Another bad feature of moststring cutters in use to-day, is that no provision has been made foradjustment of the blade to present new cutting surfaces or replacementof same without discardin the whole apparatus.

In my present invention, I have obviated the objections existing inprevious structures of this type, and have developed a circularrotatably adjusted cutter -blade that is of minimum size, simple inconstruction, safe and eiiicient in operation.

The `principal objectv of my invention therefore, is a string cutter ofthe circular blade type.

Another object is an improved form of safety guard to hold the circularblade.

Still another object is an improved means for mounting said cutter bladeso that new surfaces may be presented to the operator from time to time,and replacement of new blades made when all the sharp surfaces of theold blade have been utilized. y

Other objects and novel 'features of the construction and arrangement ofparts constituting my invention will appear as the description of theinvention progresses.

In the accompanying drawings illustrating the preferred embodiment of myinvention,

Fig. 1 is a plan looking down, and showing the string cutter mountedupon the edge of a counter, table or similar piece of furniture uponwhich bundles are placed to be wrapped;

Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1.

Fig. 3 is a modified form of Fig. 1, and is nos.

type of counter F ig. 4 is a vertical section taken on the l' line 1-4fof Fig. 3.

a wrapping counter or table, to the edge of which is secured the stringcutter body 11,

for that purpose in the depending side of by screws 12 passing thruholes prepared the lcutter body 11. The depending side of the cutterbody 11, I have indicated by the character 13, and is `formed by thesimple process of bending the long side of the member 11 down at rightangles and thereby forming a right angled bracket to rmly mount thecutter as above described. The front of the cutter body is shaped in asemicircular manner with a somewhat semi-circular cut-out portion 16whose radial center is in the same plane as that of the outer guardmembers 14 which are separated by the opening 15 cut in the body member11. At 17, I have provided a countersunk hole in which is inserted themachine screw 18. Directly below and on the opposite side of the centralportion 19 of the body guard 11 is mounted the circular cutter 2Oadapted to fit over the machine screw 18. Adjacent the cutter, andfirmly clamping same to member 11, is the clamping collar 21`which isprovided with a tapped hole 22 adapted to receive the machine screw 18and firmly clamp the kblade 20 tov the central body member 19 of thebody guard 11.

Fig. 4: shows a modified form in which a cutter of the same shape as inFigs. 1 and 2 may be used by splitting said cutter in two halves makingtwo semi-circular halves.

lThis form of string cutter is for use in shipping rooms where string ofa heavier form is used. Fig. 3 is a plan view of same corresponding toFig. 1 of the preferred form and having a guard member 23 withprojecting members to eifectl an easy entrance tov the cut-out recess25. The cutter proper 26 is adapted to be clamped in the same manner tothe body 23 as in Figs. 1 and 2 by means of the clamping member 27 onthe under side of cutter blade,fand the machine screw 28 which passesthru an opening prepared for that purpose in the'blade 26.

In operation a string S is projected against the cutter 20 or 26 and inalmost every case will have a tendency to be pushed to one sideor theother of the central opening 15 causing it to be severed by coming eoReferring to the drawings, 10 deslgnates in contact with the blade 20 or26, but at the same time the hands, wrists, arms and other parts of theoperators body are protected from the blade 2O or 26 by the `guardineinbers 14. The smooth curved form oi' the guai-d as shown in Fig. land again more pronounced at Fig. 3 eliminates many accidents toclothing by catching on the apparatus. After the cutter has been dulledby long use, the screw 18 may be loosened and the cutter blade 20rotated to a Ynew position thus presentingV a fresh sharp edge. At thetime when no more fresh cutting edges are available on cutter blade 20,a iiewblade 1 may be inserted by removing' the screw i8 combination, astationary guard and supporting member, the outer edge of which isshaped in the form of two oppositely opposed semi-crescents therebyforming an internal recess With a by-pass from the internal recess pastthe points of the semi-cresceiits to the outer edge of said guard, acircular cutter blade adjustably mounted upon said lguard concentricwith said internal recess and adapted Vto engage any oreignmatterinserted between the points of said senii.

hold said cutter blade against the under side of said Aguard bymeans ofa tightening member passing through saidguard, said blade andterminating in said collar.

Iii Witness whereof, I hereunto subscribe"r`

